Cruisers Forum
 


Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 21-02-2020, 01:01   #1
Registered User

Join Date: Apr 2007
Location: Australia
Boat: Island Packet 40
Posts: 4,205
Images: 7
Navionics V Cmap, East Coast of Australia

Hi,

I recently installed a second MFD at the helm and am considering an upgrade to the electronics charts in the second unit.

I am using Navionics Australia and New Zealand in the original MFD and found it to be pretty good (I have learned to stay on the dashed purple line in shallow water because whoever put it on their has a much better eye for shallow water than I do)

I am considering whether or not to put Cmap All of Australia in the second MFD and particularly whether or not it will give me greater detail or more accurate depths than the Navionics.

I tend to poke up creeks and rivers wander about near shore during my coastal cruising.

Any advice from folks familiar with these charting systems would be greatly appreciated..
RaymondR is offline   Reply With Quote
Old 21-02-2020, 02:56   #2
Registered User
 
Mr B's Avatar

Join Date: Aug 2011
Location: Melbourne Australia
Boat: Paper Tiger 14 foot, Gemini 105MC 34 foot Catamaran Hull no 825
Posts: 2,647
Re: Navionics V Cmap, East Coast of Australia

Following,
Mr B is offline   Reply With Quote
Old 21-02-2020, 04:13   #3
Registered User
 
clownfishsydney's Avatar

Join Date: Mar 2014
Location: Sydney, Australia
Boat: Lightwave 38' Catamaran - now sold
Posts: 448
Re: Navionics V Cmap, East Coast of Australia

My Navionics had some problems. From memory, the entrances to Round Head Creek at 1770, Pancake Creek and Lady Musgrave Island are totally wrong, you would end up ashore if you followed the channels! Also many reefs near Townsville had totally incorrect depths (mostly deeper than what Navionics stated).
__________________
Michael
Formerly of Catlypso - Web Site
Lightwave 38' cat
clownfishsydney is offline   Reply With Quote
Old 21-02-2020, 04:37   #4
Registered User

Join Date: Dec 2009
Location: Australia
Boat: building Roberts Mauritius 43ft
Posts: 2,107
Re: Navionics V Cmap, East Coast of Australia

Quote:
Originally Posted by clownfishsydney View Post
My Navionics had some problems. From memory, the entrances to Round Head Creek at 1770, Pancake Creek and Lady Musgrave Island are totally wrong, you would end up ashore if you followed the channels! Also many reefs near Townsville had totally incorrect depths (mostly deeper than what Navionics stated).



I'm a little confused. Were you using CMap that gave you deeper depths than Navionics?
coopec43 is offline   Reply With Quote
Old 21-02-2020, 04:59   #5
Registered User

Join Date: Apr 2007
Location: Australia
Boat: Island Packet 40
Posts: 4,205
Images: 7
Re: Navionics V Cmap, East Coast of Australia

Quote:
Originally Posted by clownfishsydney View Post
My Navionics had some problems. From memory, the entrances to Round Head Creek at 1770, Pancake Creek and Lady Musgrave Island are totally wrong, you would end up ashore if you followed the channels! Also many reefs near Townsville had totally incorrect depths (mostly deeper than what Navionics stated).
My experience with Navionics is similar. Fortunately so far the error has been deeper water than charted but it does tend to impact on ones confidence in the product. I have not yet had any problems with position.

Had a look at some UTube presentations and the C-Map 4D stuff looks pretty interesting. I'll probably go that way for the diversity of sources aspect.
RaymondR is offline   Reply With Quote
Old 21-02-2020, 04:59   #6
Registered User
 
Karanga's Avatar

Join Date: Jun 2018
Location: NZ/Aus
Boat: Crowther 85 Catamaran
Posts: 163
Re: Navionics V Cmap, East Coast of Australia

I use opencpn running the oesnc(?) purchased charts as my primary nav chart. It works very well. However, I *think* the origins of the data are "shipping" oriented, so while the details are just about always very correct, some of the in-close to reefs details etc is a little too broad-brush. I have resorted to Navionics on phone/tablet to get more refined depth contours, and better indication of bommies etc. In shallow waters (eg Narrows) the purple line is usually a good indicator of best route, but as indicated, doesn't match reality at Round Head or Lady Musgrave.
Navionics usually has better/more correct updates of channel markers than opencpn/oesnc
Tim
Karanga is offline   Reply With Quote
Old 21-02-2020, 10:41   #7
Registered User

Join Date: Jan 2013
Location: On Board but also Scotland
Boat: Prout
Posts: 143
Re: Navionics V Cmap, East Coast of Australia

I used Navionics from Coffs Harbour to Sydney for 6 months, at times with poor weather, but found it spot on.
inchcailloch is offline   Reply With Quote
Old 21-02-2020, 14:20   #8
Registered User

Join Date: Apr 2019
Location: Fairhaven
Boat: Farrier 43x
Posts: 20
Re: Navionics V Cmap, East Coast of Australia

I believe they both use the same base maps. Both are really accurate in shipping areas but canít be entirely relied on in lesser travelled areas. 1770 is a good example. The sand bank has totally changed and navionics is no longer accurate.
The good news is that users can post edits (such as 1770) and entry markers are there to be followed. Also itís good to be sure you zoom right in when unsure to bring up more detail.
Have fun
Tumblewoods is offline   Reply With Quote
Old 21-02-2020, 18:10   #9
Registered User

Join Date: Jan 2015
Location: Oz, PNG, Western Pacific
Boat: Adams 42
Posts: 77
Re: Navionics V Cmap, East Coast of Australia

Hi.
I use I sailor on a tablet and a smart phone, and open cpn with C map on a laptop.
The I sailor charts are extensive more up to date and not costly. They are updatable under the initial purchase plan. I sailor takes time to respond on a slower machine.
I sailor beat the pants off Navionics when I compared them some years ago. May have changed since.
UPS, redundancy, alternatives are important factors.
Cheers.
Frugal is offline   Reply With Quote
Old 21-02-2020, 22:16   #10
Registered User

Join Date: May 2011
Location: Australia
Boat: Wauquiez Pilot Saloon 40
Posts: 25
Re: Navionics V Cmap, East Coast of Australia

We have both Navionics and CMap (Jepperson). Have used them for years. We prefer Navionics. As to accuracy- we have never had an issue. But we always keep our heads out of the cockpit and keep a good lookout, plus watch the depth sounder like a hawk. My personal view is that all charts are just rough guides when navigating near land. And bars etc change. Eg Wide Bay Bar where one should never cross without talking to the local Marine Rescue people and get their mud map and waypoints.
John Williams is offline   Reply With Quote
Old 21-02-2020, 22:36   #11
Registered User
 
clownfishsydney's Avatar

Join Date: Mar 2014
Location: Sydney, Australia
Boat: Lightwave 38' Catamaran - now sold
Posts: 448
Re: Navionics V Cmap, East Coast of Australia

The problems I related about Navionics relate not to depth, but actual channels. For example, the real channel at 1770 and Pancake Creek went through the headland on the chart. At Lady Musgrave, if you followed the chartplotter, you would have hit one side of the channel. At Townsville, depths on the reefs was nothing like reality. Some were much shallower and others much, much deeper, meaning where I thought I could anchor it was way too deep.
__________________
Michael
Formerly of Catlypso - Web Site
Lightwave 38' cat
clownfishsydney is offline   Reply With Quote
Old 22-02-2020, 02:13   #12
Registered User

Join Date: Apr 2007
Location: Australia
Boat: Island Packet 40
Posts: 4,205
Images: 7
Re: Navionics V Cmap, East Coast of Australia

Thanks a lot for the replies folks.

I have noticed the depth anomalies quiet often whilst following the purple dashed line ascending and descending both the Mary and Fitzroy rivers in Queensland and wondered why they did not adjust the charts accordingly. I assumed that they are using non updated official data for the mapping and are getting the track data from more up to date but unofficial sources from downloaded real track data. I have learned from experience in both rivers to trust the purple dashed track line far more than the hydrographic data.

1770 has been shoaling up for years. I used to anchor in the deep channel along the beach near the entrance because it shortens the long leg from Pancake Creek to Burnett Heads by about 12 nm. After having a couple of very bad experiences fleeing there in the middle of the night when the wind went to the north and picked up I gave it up. Pity it's so shoal and constricted as it's quiet a pretty place and well worth a stay for a few days.
RaymondR is offline   Reply With Quote
Old 02-10-2020, 19:42   #13
Registered User

Join Date: Jul 2017
Posts: 2
Re: Navionics V Cmap, East Coast of Australia

Hi guys,
Anyoneout there know how to get the GPS indicator on the Cmap chart on my laptop, It appears on my spart laptop but for some reason it will not appear, is the a box to tickplease ???
Regards Locko
brian laughlin is offline   Reply With Quote
Old 02-10-2020, 20:37   #14
Senior Cruiser
 
StuM's Avatar

Cruisers Forum Supporter

Join Date: Nov 2013
Location: Port Moresby,Papua New Guinea
Boat: FP Belize Maestro 43 and OPB
Posts: 10,729
Re: Navionics V Cmap, East Coast of Australia

CMAP chart or C-MAP app?

What operating system is on the laptop?
What GPS do you have connected to the laptop?
What charting application are you using on the laptop?
StuM is offline   Reply With Quote
Reply

Tags
Australia, east coast, navionics

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Navionics CMap CampDavid Marine Electronics 2 21-04-2018 09:46
For Sale: CMAP NT+ NA-E306.10 Florida East Coast & Bahamas jibstay Classifieds Archive 0 24-02-2016 12:28
Bahamas CMAP or Navionics or something else :-) akprb Navigation 4 23-11-2015 11:47
For Sale: CMAP NT+ Card - Florida East Coast & Bahamas Mambo Classifieds Archive 5 08-03-2012 07:30
Navionics Classic series Australia or East Coast Charts nev4 Marine Electronics 0 12-01-2012 05:57

Advertise Here


All times are GMT -7. The time now is 05:02.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.